4G15 in the Proton Saga Fastback

250cc V-Twin with a bore of 56 mm and 50.8 mm stroke, makes about 53hp and 59 lb-ft

Fictional 3.8 60-degree V6 (92.8mm bore and 94mm stroke) in a 1384kg chassis

989cc I3 (72mm bore and 81mm stroke) EJ-VE DVVT (the fuel consumption is crazily inaccurate) makes about 60-61hp and ...

(Credit to _dan) only works on V1.14, really close to a 528i E39, chassis weight 1560kg

Body weight 1896kg, about 700hp, really torquey

Credit to Playerindo10, 60kg chassis, 5HP

Small displacement V6, make about 129HP

A single cylinder 2 stroke thumper, credit to Playerindo10

It will keep stalling if you want to put it in first gear. Sometimes it works, starter will help. Credit to Playerind...

To replicate the 8-speed automatic gearbox, do not use clutch while shifting. Credit to juancruz